mesa: Include mfeatures.h in program.c.

Include mfeatures.h for feature tests.
diff --git a/src/mesa/program/program.c b/src/mesa/program/program.c
index 9ffa49b..52254e9 100644
--- a/src/mesa/program/program.c
+++ b/src/mesa/program/program.c
@@ -32,6 +32,7 @@
 #include "main/glheader.h"
 #include "main/context.h"
 #include "main/hash.h"
+#include "main/mfeatures.h"
 #include "program.h"
 #include "prog_cache.h"
 #include "prog_parameter.h"